diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index a0c7ca5e883..a72eb318ef1 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -330,8 +330,12 @@ jobs:
             message(FATAL_ERROR "Failed to install dependencies")
           endif()
         endif()
+        find_package(Python3 REQUIRED COMPONENTS Interpreter)
+        # hack to replace 32-bit python found by this script with 64-bit one
+        # required for linking qtcreatorcdbext
+        string(REPLACE "x86" "x64" Python3_EXECUTABLE "${Python3_EXECUTABLE}")
         execute_process(
-          COMMAND python -m pip install --user beautifulsoup4 lxml
+          COMMAND ${Python3_EXECUTABLE} -m pip install --user beautifulsoup4 lxml
           RESULT_VARIABLE result
         )
         if (NOT result EQUAL 0)
@@ -394,6 +398,9 @@ jobs:
           set(ELFUTILS_OPTION)
         endif()
 
+        find_package(Python3 REQUIRED COMPONENTS Interpreter)
+        string(REPLACE "x86" "x64" Python3_EXECUTABLE "${Python3_EXECUTABLE}")
+
         execute_process(
           COMMAND python
             -u
@@ -403,6 +410,7 @@ jobs:
             --build build
             --qt-path "${{ steps.qt.outputs.qt_dir }}"
             --llvm-path "${{ steps.libclang.outputs.libclang_dir }}"
+            --python3 "${Python3_EXECUTABLE}"
             --with-tests
             ${CDB_OPTION}
             ${ELFUTILS_OPTION}
diff --git a/scripts/build.py b/scripts/build.py
index c4b2e36cc7e..1aa491f1bc1 100755
--- a/scripts/build.py
+++ b/scripts/build.py
@@ -132,6 +132,7 @@ def build_qtcreator(args, paths):
 
     if args.python3:
         cmake_args += ['-DPYTHON_EXECUTABLE=' + args.python3]
+        cmake_args += ['-DPython3_EXECUTABLE=' + args.python3]
 
     if args.module_paths:
         module_paths = [common.to_posix_path(os.path.abspath(fp)) for fp in args.module_paths]